<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var arr1=[11,22,33,12,45,78,12,23,56,89,13,14,15,169];
    // 用循环依次输出数组的每一个元素的值

    for(var i=0;
            i< arr1.length;
                i--){
        console.log(arr1[i]+',') ;
    }

</script>
</body>
</html>